Dark Knight theatre shooter James Holmes? Not on Facebook. Norwegian neo-Nazi mass murderer Anders Brievik? Also not on Facebook.

What about you?

Normal, of course, changes with times and trends. And in a world in which 955 million people are on Facebook, including about 50 percent of North Americans, not being social online is starting to be different.

Or, to use an uglier word, abnormal.

That’s essentially what German news agency Der Tagesspiegel suggests, quoting a psychologist who says that “using Facebook has become a sign of having a healthy social network.” Even Forbes wonders if people who choose not to engage in an online social network are odd or untrustworthy.

Above: Suspiciously, not on Facebook

Well, we can go a long way with this. In fact there are quite a number of nasty people who are, quite suspiciously, not socially active online.